Another problem has gotten less attention. There's a period of more than 10 seconds in which Zimmerman seems to observe Martin loitering, and 'looking at all the houses.' This isn't mentioned in any of the SPD interviews. It seems to be directly contradicted, in statements that suggest, more or less strongly, that Martin was already approaching when Zimmerman became aware of him at this point.
From the reenactment, when they're still in the car, approaching the location where GZ parked his vehicle on TTL, right when the wind kicks up and drowns out most of what GZ is saying, it sounds like he says "And I saw him st....". I hear a strong "st" sound, like he's either saying "standing" or "staring", though I lean towards "standing". I believe this may have been GZ describing something similar to the 10 seconds you are referring to.https://www.youtube.com/watch?v=X_2NeMrGCvg&t=5m47s
One more issue.
The 'black male' and 'button' comments suggest that Zimmerman was getting a close look at Martin for the first time. Listening to Zimmerman's voice on the recording, I feel it is very hard to believe this is not the case.
In the SPD interviews, Zimmerman claimed to have had at least one close look at Martin before he called the police.
I also agree that GZ is getting a particularly clear view of TM at this point in time, and noticing things he hadn't noticed earlier, or wasn't certain of, anyway. I think this is consistent with GZ parked on TTL, facing east, with TM approaching him head-on, likely being illuminated by GZ's headlights (approaching his SUV, leading up to the circling). I'm not sure what portion of the SPD interviews you're referring to where he claims he had "at least one close look at Martin before he called the police."
What are you drawing from this "one more issue"?